不同打顶时期对杂交棉冠层结构影响的研究  

The Effect of Different Topping Date on Canopy Structure of Hybrid Cotton

作　　者：王冀川[1] 高山[1] 韩秀峰[1] 邹晓波[1] 

机构地区：[1]塔里木大学植物科学学院,新疆阿拉尔843300

出　　处：《塔里木大学学报》2012年第1期7-14,共8页Journal of Tarim University

基　　金：塔里木大学校长基金项目(TDZKZD09001);塔里木大学校长基金项目(TDZKSS1004);兵团工业科技攻关计划项目(2009GG31)

摘　　要：应用CI-110作物冠层结构分析仪,采集杂交棉兆丰1号和新陆中31号不同打顶时间的群体冠层结构数字图像,通过信息提取专用软件获得不同打顶处理群体冠层的结构特征并进行分析表明:打顶时期显著影响杂交棉冠层结构,在7月13-22日打顶处理的群体最大叶面积指数(LAI)适宜,平均叶簇倾角(MFIA)较低,散射辐射透过系数(TCDP)和直射辐射透过系数(TCRP)较高,平均叶分布(LD)值在盛花期各层次分布均匀、铃絮期中上部分布较高;消光系数(K)由上而下均匀增加,群体结构优化,单株结铃多,产量最高;打顶过早或过晚均不利于群体冠层结构的优化。不同株型品种的冠层结构特征对打顶时期反应不同,生产中应根据品种特性合理安排打顶时期。提出了南疆杂交棉较理想的冠层结构指标。The crop canopy structure analyzer of CI - 110 was adopted to collect the digital images of canopy structure of Zhaofengl and Xinluzhao31 in the different topping date tests. By the application of image processing software, the structure characteristics of group canopy in different topping time was obtained, and the results showed that： The topping date significantly affected the canopy structure of hybrid cotton, and the treatment of topping date at July 13 -22, with an appropriate maximum LAI, lower MFIA, higher TCDP and TCRP, the evenly distributed in all layers average LD in flowering stage, higher average LD in upper layers in bolls opening stage, increased extinction coefficient K top to down the plant, optimized group structure, more bolls per plant, and the highest yield. Too early or too late to top were not conducive to the optimization of canopy structure. The reactions of canopy structure of different type species to toping date were different, so the toping date should be reasonable arranged in actual production according to the species character. The ideal canopy structure indicators of hybrid cotton in South Xinjiang were given .

关 键 词：杂交棉 种植密度 冠层结构 产量 

分 类 号：S562[农业科学—作物学]